Should I Switch Underwear With My Boyfriend For The Day?

Yeah... then what happens when he has a heart attack while he's whacking it in the bathroom or gets hit by a car with your underwear on. Try explaining that to the paramedics. It's also not a good idea for his reproductive health. Girl's panties are made to look good, not to give "the boys" their adequate room. Hold them too close to the body for too long and it's sterile city. Having his sack sweat next to your stuff probably isn't the best idea either. Basically he needs to do everything he can to protect what little manhood he has left. It sounds like he's a little gender-confused already.